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4658ce9c1f
When both constants are positive or both constants are negative, InstCombine already simplifies comparisons like this, but when it's exactly zero and -1, the operand sorting ends up reversed and the pattern fails to match. Handle that special case. Follow up for rdar://14689217 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188512 91177308-0d34-0410-b5e6-96231b3b80d8